Document and Entity Information - USD ($)	12 Months Ended
	Sep. 30, 2017	Dec. 15, 2017	Mar. 31, 2017
Document and Entity Information:
Entity Registrant Name	ALTEX INDUSTRIES INC
Document Type	10-K
Document Period End Date	Sep. 30, 2017
Trading Symbol	altx
Amendment Flag	false
Entity Central Index Key	0000775057
Current Fiscal Year End Date	--09-30
Entity Common Stock, Shares Outstanding		12,555,131
Entity Public Float			$ 387,000
Entity Filer Category	Smaller Reporting Company
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY